There are upsides to planting your peach tree in fall due to balanced weather and the start of dormancy, but it's only worth doing if you're in zone 8 or above.
Should You Be Planting A Peach Tree In The Fall? Here's Why It Might Be Worth It

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There are upsides to planting your peach tree in fall due to balanced weather and the start of dormancy, but it's only worth doing if you're in zone 8 or above.